Karn, Gilded Guardian is a five-color artifact deck that floods the board with cheap artifacts, then turns that density into cards, mana and oversized threats. Karn draws one card per color among other artifacts on entry, so cards that make permanents all colors and blink effects turn the commander into a repeatable refill. Cost reducers and cast triggers reward chaining many artifact spells in one turn, and payoffs scale with artifact count to close the game. How it wins: It wins by swinging with artifact-scaling threats and anthem or pump effects, supported by an extra-turn line, Breya's direct damage, and a Jace empty-library win off massive card draw. Key roles: - Rainbow artifacts for Karn: Effects that make every permanent all colors, or that copy or are multicolored artifacts, let Karn draw up to five cards. Re-triggering his entry turns the commander into a card engine. (Leyline of the Guildpact, Sphinx of the Guildpact, Teleportation Circle) - Flicker package: Blink effects reuse enter-the-battlefield triggers from Karn, Gearhulks, card-drawing creatures and token makers for extra value. (Ephemerate, Cloudshift, Teleportation Circle) - Cost reduction and artifact chaining: Discounters, zero-cost artifacts and fast mana let many artifact spells resolve in one turn. That feeds metalcraft, improvise and affinity. (Etherium Sculptor, Foundry Inspector, Mox Opal) - Cast-trigger engines: Cards that draw or make tokens whenever an artifact spell is cast turn each cheap artifact into fuel. Tokens further inflate the artifact count. (Vedalken Archmage, Sai, Master Thopterist, Pinnacle Emissary) - Artifact-count payoffs: Threats and team pumps grow with the number of artifacts controlled, converting a wide board into lethal damage. (Craterclaw Colossus, Bronze Guardian, Chief of the Foundry) - Sacrifice outlets and alternate wins: Sacrifice outlets cash in spare artifacts and tokens for mana, burn, removal or an extra turn. Huge draw from Memnarch or The One Ring can end the game through Jace. (Time Sieve, Breya, Etherium Shaper, Jace, Wielder of Mysteries)

Karn, Gilded Guardian decklist

• Arcane Signet
• Ashnod's Altar
• Chromatic Lantern
• Cloud Key
• Cursed Mirror
• Lotus Petal
• Moonsilver Key
• Mox Opal
• Sol Ring
• Sword of the Meek
• The One Ring
• Time Sieve
• Uthros Research Craft
• Ancient Den
• Blood Crypt
• Breeding Pool
• Buried Ruin
• Command Tower
• Darkmoss Bridge
• Darksteel Citadel
• Drossforge Bridge
• Exotic Orchard
• Flooded Strand
• 2× Forest
• Godless Shrine
• Great Furnace
• Inventors' Fair
• 2× Island
• Jungle Shrine
• Minamo, School at Water's Edge
• Mistvault Bridge
• 2× Mountain
• 2× Plains
• Polluted Delta
• Sacred Foundry
• Scalding Tarn
• Seat of the Synod
• Steam Vents
• Stomping Ground
• 2× Swamp
• The World Tree
• Tree of Tales
• Undercity Sewers
• Urza's Saga
• Vault of Whispers
• Watery Grave
• Baleful Strix
• Breya, Etherium Shaper
• Brightglass Gearhulk
• Bronze Guardian
• Chief of the Foundry
• Craterclaw Colossus
• Diversion Unit
• Enthusiastic Mechanaut
• Esper Sentinel
• Etherium Sculptor
• Foundry Inspector
• Jhoira, Weatherlight Captain
• Memnarch, the Warden
• Mendicant Core, Guidelight
• Padeem, Consul of Innovation
• Phyrexian Metamorph
• Pinnacle Emissary
• Ramos, Dragon Engine
• Riptide Gearhulk
• Sai, Master Thopterist
• Sphinx of the Guildpact
• Thought Monitor
• Urza, Lord High Artificer
• Vedalken Archmage
• Waxen Shapethief
• Leyline of the Guildpact
• Teleportation Circle
• Counterspell
• Dispatch
• Dovin's Veto
• Ephemerate
• Muddle the Mixture
• Path to Exile
• Rapid Hybridization
• Swords to Plowshares
• Jace, Wielder of Mysteries
• Fabricate
• One with the Machine
• Organic Extinction
• Reshape